SIG SAUER MCX-SPEAR LT Rifle – 5.56 NATO, 16″ Barrel, Collapsible/Folding Stock, Black Finish, 30-Round
The SIG SAUER MCX-SPEAR LT WRMCX-556N-16B-LT is a full-size semi-automatic rifle chambered in 5.56 NATO and built on SIG SAUER’s next-generation MCX platform. Designed as a highly modular and reliable rifle system, the MCX-SPEAR LT combines a lightweight piston-driven operating system with advanced ergonomics, ambidextrous controls, and a versatile folding/collapsible stock configuration.
Featuring a 16-inch barrel, the MCX-SPEAR LT provides a balanced configuration suited for general-purpose rifle applications. The rifle uses a short-stroke gas piston system with a rotating bolt design, helping reduce fouling in the receiver while maintaining reliable cycling. The updated SPEAR LT platform incorporates improvements such as a lighter M-LOK handguard, ambidextrous bolt controls, and enhanced modularity compared with earlier MCX generations.
Finished in Black, this model includes a collapsible/folding stock, free-floating M-LOK handguard, full-length Picatinny top rail, and a 30-round magazine. The MCX-SPEAR LT is designed for users seeking a modern rifle platform with adaptable configuration options, robust construction, and proven SIG SAUER engineering.
Specifications
| Feature | Specification |
|---|---|
| Manufacturer | SIG SAUER |
| Model | MCX-SPEAR LT |
| Model Number | WRMCX-556N-16B-LT |
| Caliber | 5.56 NATO |
| Action | Semi-Automatic |
| Operating System | Short-Stroke Gas Piston |
| Bolt Type | Rotating Bolt |
| Barrel Length | 16 inches |
| Barrel Twist Rate | 1:7″ RH |
| Barrel Type | Cold Hammer Forged Barrel |
| Finish | Black |
| Receiver Material | Aluminum |
| Handguard | Free-Floating Aluminum M-LOK Handguard |
| Stock | Collapsible/Folding Stock |
| Magazine Capacity | 30 Rounds |
| Magazine Type | AR-15 Pattern Magazine |
| Trigger | SIG Flatblade Match Trigger |
| Safety | Ambidextrous Safety Selector |
| Controls | Fully Ambidextrous |
| Optics Mount | Full-Length M1913 Picatinny Rail |
| Muzzle Device | SIG Suppressor-Compatible Flash Hider |
| Overall Length | Approx. 32.5″–35.5″ (stock position dependent) |
| Weight | Approx. 7 lbs |
Key Features
- Chambered in 5.56 NATO
- Full-length 16-inch barrel
- Advanced MCX-SPEAR LT piston system
- Durable Black finish
- Collapsible and folding stock design
- Lightweight aluminum receiver
- Free-floating M-LOK handguard
- Full-length optics rail
- Fully ambidextrous controls
- SIG flatblade match trigger
- Modular MCX architecture
- 30-round magazine capacity
The SIG SAUER MCX-SPEAR LT 5.56 NATO 16″ Rifle represents the evolution of the MCX family, offering a modern piston-driven rifle platform that combines modularity, reliability, and ergonomic improvements for a wide range of shooting applications
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